earthquake prediction: a precursor of earthquakes is an increase in radon emissions release.

radiation therapy in hospitals: hospitals either pump radon from radium sources and seal it in small

                                                       "seed" tubes or they purchase these tubes from suppliers for application 

                                                        to patients.

occasional therapeutic use: such as in the "therapeutic" waters of Hot Springs, Arkansas

*radon costs $4 per mCi (milliCurie)


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